One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,4,8)(9,10)(11,15)(12,13)(14,16)(17,18)(19,22)(20,21)(23,27)(24,28)(25,30)(26,29)(31,32)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,24,27)(18,22,28,23)(20,29,31,25)(21,26,32,30)(10,13)(14,15)(17,20,23,30,24,31,22,26)(18,25,19,21,28,29,27,32)(1,3,5,4)(2,7,6,8)(9,11,12,16)(10,14,13,15)(17,21,22,25,24,32,23,29)(18,26,27,31,28,30,19,20)(1,4,5,3)(2,7,6,8)(17,22,24,23)(18,19,28,27)(20,30,31,26)(21,25,32,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.